Pl.cell.aph. 5. IDIOTHALAMEZ. 129. Lithocia. 497 
VIII. 129. LITHOCIA. Acharius. Stone-moss. 
Thallus crustlike, nearly tartarlike, unbroken, cracked 
in beds, or powdery, flat, expanded, adnate, uniform ; apo- 
thecia with a nearly globular hemispherical thalamium, in- 
nate at bottom in the thallus; perzthectwm double, the ex-. 
terior nearly cartilaginous, thick, black, halved above, with 
a nipple or mouth; the interior very thin, membranaceous ; 
enclosing all around a nearly globular, vesicular, cellular 
nucleus. 
1. Lithocia Schraderi. Schrader’s sione-moss. 
Crust tartarlike, unbroken, whitish; apothecia small, 
crowded, sunk, nearly globular; inside dirty-white, trans- 
parent. 
Lichen Schraderi, Achar. Prod. 13; Engl. Bot. 1711. 
Lichen immersus, Hoffm. Lich. 24. 
Verrucaria immersa, Persvon in Uster. Ann, 7. 
Verrucaria rupestris, Schrader Germ. 109. 
Verrucaria Schraderi, Achar. Meth. 114; Lich, 284. “ 
On limestone and chalk. 
2. Lithocia Harrimannu.. Harrimann’s stone-moss. 
Crust tartarlike, unbroken, distinctly limited, very thin, 
slightly pitted, mouse-colour; apothecia minute, nearly 
globular, sunk, nipple conical; inside dirty white. 
Verrucaria Harrimanni, Achar. Lich. 284; Engl. Bot. 2539, 
On hard grey limestone rocks. 
3. Lithocia plumbea. Lead-grey stone-moss. 
Crust tartarlike, scarcely broken, regular, very finely 
cracked, rather wrinkly, lead-colour ; apothecia nearly glo- 
- bular, innate, become depressed above, saucershape; in- 
side white. 
Verrucaria plumbea, Achar. Lich. 285. 
Lichen plumbosus, Engl, Bot, 2540. 
On limestone-rocks. 
4, Lithocia glaucina. Greenish stone-moss. 
Crust cracked in beds, greenish-brown; apothecia hali- 
sunk, prominent part hemispherical, afterwards pierced ; in- 
side dirty white, transparent.: : 
Verrucaria glaucina, Achar, Syn. 94, 
On the hardest stones. 
VOL, IL. 9 kK 
